框架薄壁类结构压电分流阻尼多模态减振实验研究

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摘要本文以四边固支铝合金板（框架薄壁类结构）为研究对象开展了基于压电分流阻尼电路的多模态减振实验研究。首先，开展了扫频激励下单压电片单模态减振实验，电路最优参数实验结果与理论计算结果相互吻合，同时发现电路最优参数可在一个区间内取值，而不需要与理论计算值保持绝对一致，表明压电分流阻尼电路具有良好的工程实用性。然后，基于阻塞电路开展了扫频激励下多模态减振实验，通过多个压电片实现了20～2000Hz内振动能量下降20.2%的减振效果，同时在一些主要模态频率处峰值控制效果可达63%，实验充分验证了多压电片多模态减振的可行性。最后，在噪声载荷激励下开展了多模态电路减振实验，20～2000Hz内铝合金板三个位置处加速度响应的RMS值分别降低了19.1%、18.2%、15.3%，648Hz处峰值分别下降了34.1%、33.3%、31.0%，实验结果表明多模态电路在实际工程载荷条件下仍然具有一定的减振能力。

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	刘亚宁
	周嘉明
	董龙雷
	刘建
	赵建平

关键词 ：压电分流阻尼, 多模态振动控制, 阻塞电路, 噪声激励, 薄壁结构

Abstract：In this paper, an experimental study of multi-modal vibration reduction based on piezoelectric shunt damping circuit is carried out with four-side fixed aluminum alloy plate (frame thin-walled structure) as the research object. First, a single-mode vibration reduction experiment of a single piezoelectric chip under swept frequency excitation is carried out. The experimental results of the optimal parameters of the circuit are consistent with the theoretical calculation results. At the same time, it is found that the optimal parameters of the circuit can be valued within an interval, and do not need to be absolutely consistent with the theoretical calculation values, indicating that the piezoelectric shunt damping circuit has good engineering practicability. Then, based on the blocking circuit, a multi-modal vibration reduction experiment under swept frequency excitation was carried out. The vibration reduction effect of 20.2% reduction in vibration energy within 20~2000 Hz was achieved through multiple piezoelectric sheets, and the peak control at some main modal frequencies was also achieved. The effect can reach 63%, and the experiment fully verifies the feasibility of the multi-modal vibration reduction of the multi-piezoelectric sheet. Finally, a multi-modal circuit vibration reduction experiment was carried out under the excitation of noise load. The RMS value of the acceleration response of the aluminum alloy plate at three positions within 20~2000Hz decreased by 19.1%, 18.2%, and 15.3%, respectively, and the peak value at 648Hz decreased respectively. 34.1%, 33.3%, and 31.0%. The experimental results show that the multimodal circuit still has a certain vibration reduction ability under the actual engineering load conditions.

Key words： piezoelectric shunt damping multimodal vibration control blocking circuits noise excitation thin-walled structures

收稿日期: 2022-08-25 出版日期: 2023-08-28

引用本文:

刘亚宁，周嘉明，董龙雷，刘建，赵建平. 框架薄壁类结构压电分流阻尼多模态减振实验研究[J]. 振动与冲击, 2023, 42(16): 101-109.
LIU Yaning，ZHOU Jiaming，DONG Longlei，LIU Jian，ZHAO Jianping. An experimental study on multi-modal vibration reduction of frame thin-walled structure with piezoelectric shunt damping. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(16): 101-109.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I16/101

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